[PATCH 0/5] MHI changes for v5.10 - Take two

[PATCH 0/5] MHI changes for v5.10 - Take two

[Manivannan Sadhasivam]

Hi Greg,

This is the second set of MHI patches for v5.10. The summary is below:

* Fixed the format specifier used in debugfs interface. The issue was
  identified by building for ARM32 machine.

NOTE: I've sent this patch separately for review.

* Removed the auto-start option for MHI channels. This is done to avoid
  receiving spurious uplink from MHI client device when the client driver
  is not up. The corresponding qrtr change is also included with Dave's ACK.

* Moved MHI_MAX_MTU define out of internal header to global to use it in
  client drivers.

Please consider merging!

Thanks,
Mani

Hemant Kumar (1):
  bus: mhi: core: Move MHI_MAX_MTU to external header file

Loic Poulain (3):
  bus: mhi: debugfs: Print channel context read-pointer
  bus: mhi: Remove auto-start option
  net: qrtr: Start MHI channels during init

Manivannan Sadhasivam (1):
  bus: mhi: core: debugfs: Use correct format specifiers for addresses

 drivers/bus/mhi/core/debugfs.c  | 15 ++++++++-------
 drivers/bus/mhi/core/init.c     |  9 ---------
 drivers/bus/mhi/core/internal.h |  2 --
 include/linux/mhi.h             |  5 +++--
 net/qrtr/mhi.c                  |  5 +++++
 5 files changed, 16 insertions(+), 20 deletions(-)

-- 
2.17.1

[PATCH 1/5] bus: mhi: core: debugfs: Use correct format specifiers for addresses

[Manivannan Sadhasivam]

For exposing the addresses of read/write pointers and doorbell register,
let's use the correct format specifiers. This fixes the following issues
generated using W=1 build in ARM32 and reported by Kbuild bot:

All warnings (new ones prefixed by >>):

>> drivers/bus/mhi/core/debugfs.c:75:7: warning: format specifies type 'unsigned long long' but the argument has type 'dma_addr_t' (aka 'unsigned int') [-Wformat]
                              mhi_event->db_cfg.db_val);
                              ^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/bus/mhi/core/debugfs.c:123:7: warning: format specifies type 'unsigned long long' but the argument has type 'dma_addr_t' (aka 'unsigned int') [-Wformat]
                              mhi_chan->db_cfg.db_val);
                              ^~~~~~~~~~~~~~~~~~~~~~~
   2 warnings generated.

drivers/bus/mhi/core/debugfs.c: In function ‘mhi_debugfs_events_show’:
drivers/bus/mhi/core/debugfs.c:74:51: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
   seq_printf(m, " local rp: 0x%llx db: 0x%pad\n", (u64)ring->rp,
                                                   ^
drivers/bus/mhi/core/debugfs.c: In function ‘mhi_debugfs_channels_show’:
drivers/bus/mhi/core/debugfs.c:122:7: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
       (u64)ring->rp, (u64)ring->wp,
       ^
drivers/bus/mhi/core/debugfs.c:122:22: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
       (u64)ring->rp, (u64)ring->wp,
                      ^
drivers/bus/mhi/core/debugfs.c:121:62: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 5 has type ‘dma_addr_t {aka unsigned int}’ [-Wformat=]
   seq_printf(m, " local rp: 0x%llx local wp: 0x%llx db: 0x%llx\n",
                                                           ~~~^
                                                           %x
drivers/bus/mhi/core/debugfs.c:123:7:
       mhi_chan->db_cfg.db_val);

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/bus/mhi/core/debugfs.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/bus/mhi/core/debugfs.c b/drivers/bus/mhi/core/debugfs.c
index 53d05a8e168d..f50d73054db4 100644
--- a/drivers/bus/mhi/core/debugfs.c
+++ b/drivers/bus/mhi/core/debugfs.c
@@ -71,8 +71,8 @@ static int mhi_debugfs_events_show(struct seq_file *m, void *d)
 		seq_printf(m, " rp: 0x%llx wp: 0x%llx", er_ctxt->rp,
 			   er_ctxt->wp);
 
-		seq_printf(m, " local rp: 0x%llx db: 0x%llx\n", (u64)ring->rp,
-			   mhi_event->db_cfg.db_val);
+		seq_printf(m, " local rp: 0x%pK db: 0x%pad\n", ring->rp,
+			   &mhi_event->db_cfg.db_val);
 	}
 
 	return 0;
@@ -118,9 +118,9 @@ static int mhi_debugfs_channels_show(struct seq_file *m, void *d)
 		seq_printf(m, " base: 0x%llx len: 0x%llx wp: 0x%llx",
 			   chan_ctxt->rbase, chan_ctxt->rlen, chan_ctxt->wp);
 
-		seq_printf(m, " local rp: 0x%llx local wp: 0x%llx db: 0x%llx\n",
-			   (u64)ring->rp, (u64)ring->wp,
-			   mhi_chan->db_cfg.db_val);
+		seq_printf(m, " local rp: 0x%pK local wp: 0x%pK db: 0x%pad\n",
+			   ring->rp, ring->wp,
+			   &mhi_chan->db_cfg.db_val);
 	}
 
 	return 0;
-- 
2.17.1

Re: [PATCH 1/5] bus: mhi: core: debugfs: Use correct format specifiers for addresses

[Greg KH]

On Sun, Sep 27, 2020 at 09:06:48AM +0530, Manivannan Sadhasivam wrote:
> For exposing the addresses of read/write pointers and doorbell register,
> let's use the correct format specifiers. This fixes the following issues
> generated using W=1 build in ARM32 and reported by Kbuild bot:
> 
> All warnings (new ones prefixed by >>):
> 
> >> drivers/bus/mhi/core/debugfs.c:75:7: warning: format specifies type 'unsigned long long' but the argument has type 'dma_addr_t' (aka 'unsigned int') [-Wformat]
>                               mhi_event->db_cfg.db_val);
>                               ^~~~~~~~~~~~~~~~~~~~~~~~
>    drivers/bus/mhi/core/debugfs.c:123:7: warning: format specifies type 'unsigned long long' but the argument has type 'dma_addr_t' (aka 'unsigned int') [-Wformat]
>                               mhi_chan->db_cfg.db_val);
>                               ^~~~~~~~~~~~~~~~~~~~~~~
>    2 warnings generated.
> 
> drivers/bus/mhi/core/debugfs.c: In function ‘mhi_debugfs_events_show’:
> drivers/bus/mhi/core/debugfs.c:74:51: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
>    seq_printf(m, " local rp: 0x%llx db: 0x%pad\n", (u64)ring->rp,
>                                                    ^
> drivers/bus/mhi/core/debugfs.c: In function ‘mhi_debugfs_channels_show’:
> drivers/bus/mhi/core/debugfs.c:122:7: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
>        (u64)ring->rp, (u64)ring->wp,
>        ^
> drivers/bus/mhi/core/debugfs.c:122:22: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
>        (u64)ring->rp, (u64)ring->wp,
>                       ^
> drivers/bus/mhi/core/debugfs.c:121:62: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 5 has type ‘dma_addr_t {aka unsigned int}’ [-Wformat=]
>    seq_printf(m, " local rp: 0x%llx local wp: 0x%llx db: 0x%llx\n",
>                                                            ~~~^
>                                                            %x
> drivers/bus/mhi/core/debugfs.c:123:7:
>        mhi_chan->db_cfg.db_val);
> 
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
>  drivers/bus/mhi/core/debugfs.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)

This file is not in any of the branches of any of my trees.

What was it made against?

confused,

greg k-h

Re: [PATCH 1/5] bus: mhi: core: debugfs: Use correct format specifiers for addresses

[Greg KH]

On Sun, Sep 27, 2020 at 09:06:48AM +0530, Manivannan Sadhasivam wrote:
> For exposing the addresses of read/write pointers and doorbell register,
> let's use the correct format specifiers. This fixes the following issues
> generated using W=1 build in ARM32 and reported by Kbuild bot:
> 
> All warnings (new ones prefixed by >>):
> 
> >> drivers/bus/mhi/core/debugfs.c:75:7: warning: format specifies type 'unsigned long long' but the argument has type 'dma_addr_t' (aka 'unsigned int') [-Wformat]
>                               mhi_event->db_cfg.db_val);
>                               ^~~~~~~~~~~~~~~~~~~~~~~~
>    drivers/bus/mhi/core/debugfs.c:123:7: warning: format specifies type 'unsigned long long' but the argument has type 'dma_addr_t' (aka 'unsigned int') [-Wformat]
>                               mhi_chan->db_cfg.db_val);
>                               ^~~~~~~~~~~~~~~~~~~~~~~
>    2 warnings generated.
> 
> drivers/bus/mhi/core/debugfs.c: In function ‘mhi_debugfs_events_show’:
> drivers/bus/mhi/core/debugfs.c:74:51: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
>    seq_printf(m, " local rp: 0x%llx db: 0x%pad\n", (u64)ring->rp,
>                                                    ^
> drivers/bus/mhi/core/debugfs.c: In function ‘mhi_debugfs_channels_show’:
> drivers/bus/mhi/core/debugfs.c:122:7: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
>        (u64)ring->rp, (u64)ring->wp,
>        ^
> drivers/bus/mhi/core/debugfs.c:122:22: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
>        (u64)ring->rp, (u64)ring->wp,
>                       ^
> drivers/bus/mhi/core/debugfs.c:121:62: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 5 has type ‘dma_addr_t {aka unsigned int}’ [-Wformat=]
>    seq_printf(m, " local rp: 0x%llx local wp: 0x%llx db: 0x%llx\n",
>                                                            ~~~^
>                                                            %x
> drivers/bus/mhi/core/debugfs.c:123:7:
>        mhi_chan->db_cfg.db_val);
> 
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
>  drivers/bus/mhi/core/debugfs.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)

Ah, this is against your first set of patches, that's the confusion on
my part.

Please just fix them all up and resend 1 series of patches, that isn't
broken, and I will be glad to review and take that.

thanks,

greg k-h

Re: [PATCH 1/5] bus: mhi: core: debugfs: Use correct format specifiers for addresses

[Manivannan Sadhasivam]

On Sun, Sep 27, 2020 at 12:23:10PM +0200, Greg KH wrote:
> On Sun, Sep 27, 2020 at 09:06:48AM +0530, Manivannan Sadhasivam wrote:
> > For exposing the addresses of read/write pointers and doorbell register,
> > let's use the correct format specifiers. This fixes the following issues
> > generated using W=1 build in ARM32 and reported by Kbuild bot:
> > 
> > All warnings (new ones prefixed by >>):
> > 
> > >> drivers/bus/mhi/core/debugfs.c:75:7: warning: format specifies type 'unsigned long long' but the argument has type 'dma_addr_t' (aka 'unsigned int') [-Wformat]
> >                               mhi_event->db_cfg.db_val);
> >                               ^~~~~~~~~~~~~~~~~~~~~~~~
> >    drivers/bus/mhi/core/debugfs.c:123:7: warning: format specifies type 'unsigned long long' but the argument has type 'dma_addr_t' (aka 'unsigned int') [-Wformat]
> >                               mhi_chan->db_cfg.db_val);
> >                               ^~~~~~~~~~~~~~~~~~~~~~~
> >    2 warnings generated.
> > 
> > drivers/bus/mhi/core/debugfs.c: In function ‘mhi_debugfs_events_show’:
> > drivers/bus/mhi/core/debugfs.c:74:51: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
> >    seq_printf(m, " local rp: 0x%llx db: 0x%pad\n", (u64)ring->rp,
> >                                                    ^
> > drivers/bus/mhi/core/debugfs.c: In function ‘mhi_debugfs_channels_show’:
> > drivers/bus/mhi/core/debugfs.c:122:7: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
> >        (u64)ring->rp, (u64)ring->wp,
> >        ^
> > drivers/bus/mhi/core/debugfs.c:122:22: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
> >        (u64)ring->rp, (u64)ring->wp,
> >                       ^
> > drivers/bus/mhi/core/debugfs.c:121:62: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 5 has type ‘dma_addr_t {aka unsigned int}’ [-Wformat=]
> >    seq_printf(m, " local rp: 0x%llx local wp: 0x%llx db: 0x%llx\n",
> >                                                            ~~~^
> >                                                            %x
> > drivers/bus/mhi/core/debugfs.c:123:7:
> >        mhi_chan->db_cfg.db_val);
> > 
> > Reported-by: kernel test robot <lkp@intel.com>
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> > ---
> >  drivers/bus/mhi/core/debugfs.c | 10 +++++-----
> >  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> Ah, this is against your first set of patches, that's the confusion on
> my part.
> 
> Please just fix them all up and resend 1 series of patches, that isn't
> broken, and I will be glad to review and take that.
> 

Sure, will merge this patch with debugfs one. I submitted this patch as I got
error report from Kbuild bot and I thought you applied the series to
char-misc-testing branch.

Thanks,
Mani

> thanks,
> 
> greg k-h

[PATCH 2/5] bus: mhi: debugfs: Print channel context read-pointer

[Manivannan Sadhasivam]

From: Loic Poulain <loic.poulain@linaro.org>

This value was missing in the channel debugfs output.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/bus/mhi/core/debugfs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/bus/mhi/core/debugfs.c b/drivers/bus/mhi/core/debugfs.c
index f50d73054db4..3a48801e01f4 100644
--- a/drivers/bus/mhi/core/debugfs.c
+++ b/drivers/bus/mhi/core/debugfs.c
@@ -115,8 +115,9 @@ static int mhi_debugfs_channels_show(struct seq_file *m, void *d)
 		seq_printf(m, " type: 0x%x event ring: %u", chan_ctxt->chtype,
 			   chan_ctxt->erindex);
 
-		seq_printf(m, " base: 0x%llx len: 0x%llx wp: 0x%llx",
-			   chan_ctxt->rbase, chan_ctxt->rlen, chan_ctxt->wp);
+		seq_printf(m, " base: 0x%llx len: 0x%llx rp: 0x%llx wp: 0x%llx",
+			   chan_ctxt->rbase, chan_ctxt->rlen, chan_ctxt->rp,
+			   chan_ctxt->wp);
 
 		seq_printf(m, " local rp: 0x%pK local wp: 0x%pK db: 0x%pad\n",
 			   ring->rp, ring->wp,
-- 
2.17.1

[PATCH 3/5] bus: mhi: Remove auto-start option

[Manivannan Sadhasivam]

From: Loic Poulain <loic.poulain@linaro.org>

There is really no point having an auto-start for channels.
This is confusing for the device drivers, some have to enable the
channels, others don't have... and waste resources (e.g. pre allocated
buffers) that may never be used.

This is really up to the MHI device(channel) driver to manage the state
of its channels.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/bus/mhi/core/init.c     | 9 ---------
 drivers/bus/mhi/core/internal.h | 1 -
 include/linux/mhi.h             | 2 --
 3 files changed, 12 deletions(-)

diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
index 799111baceba..ca08437dffd6 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/core/init.c
@@ -772,7 +772,6 @@ static int parse_ch_cfg(struct mhi_controller *mhi_cntrl,
 		mhi_chan->offload_ch = ch_cfg->offload_channel;
 		mhi_chan->db_cfg.reset_req = ch_cfg->doorbell_mode_switch;
 		mhi_chan->pre_alloc = ch_cfg->auto_queue;
-		mhi_chan->auto_start = ch_cfg->auto_start;
 
 		/*
 		 * If MHI host allocates buffers, then the channel direction
@@ -1177,11 +1176,6 @@ static int mhi_driver_probe(struct device *dev)
 			goto exit_probe;
 
 		ul_chan->xfer_cb = mhi_drv->ul_xfer_cb;
-		if (ul_chan->auto_start) {
-			ret = mhi_prepare_channel(mhi_cntrl, ul_chan);
-			if (ret)
-				goto exit_probe;
-		}
 	}
 
 	ret = -EINVAL;
@@ -1215,9 +1209,6 @@ static int mhi_driver_probe(struct device *dev)
 	if (ret)
 		goto exit_probe;
 
-	if (dl_chan && dl_chan->auto_start)
-		mhi_prepare_channel(mhi_cntrl, dl_chan);
-
 	mhi_device_put(mhi_dev);
 
 	return ret;
diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h
index 7989269ddd96..33c23203c531 100644
--- a/drivers/bus/mhi/core/internal.h
+++ b/drivers/bus/mhi/core/internal.h
@@ -563,7 +563,6 @@ struct mhi_chan {
 	bool configured;
 	bool offload_ch;
 	bool pre_alloc;
-	bool auto_start;
 	bool wake_capable;
 };
 
diff --git a/include/linux/mhi.h b/include/linux/mhi.h
index d4841e5a5f45..6522a4adc794 100644
--- a/include/linux/mhi.h
+++ b/include/linux/mhi.h
@@ -214,7 +214,6 @@ enum mhi_db_brst_mode {
  * @offload_channel: The client manages the channel completely
  * @doorbell_mode_switch: Channel switches to doorbell mode on M0 transition
  * @auto_queue: Framework will automatically queue buffers for DL traffic
- * @auto_start: Automatically start (open) this channel
  * @wake-capable: Channel capable of waking up the system
  */
 struct mhi_channel_config {
@@ -232,7 +231,6 @@ struct mhi_channel_config {
 	bool offload_channel;
 	bool doorbell_mode_switch;
 	bool auto_queue;
-	bool auto_start;
 	bool wake_capable;
 };
 
-- 
2.17.1

[PATCH 4/5] net: qrtr: Start MHI channels during init

[Manivannan Sadhasivam]

From: Loic Poulain <loic.poulain@linaro.org>

Start MHI device channels so that transfers can be performed.
The MHI stack does not auto-start channels anymore.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 net/qrtr/mhi.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/qrtr/mhi.c b/net/qrtr/mhi.c
index ff0c41467fc1..7100f0bac4c6 100644
--- a/net/qrtr/mhi.c
+++ b/net/qrtr/mhi.c
@@ -76,6 +76,11 @@ static int qcom_mhi_qrtr_probe(struct mhi_device *mhi_dev,
 	struct qrtr_mhi_dev *qdev;
 	int rc;
 
+	/* start channels */
+	rc = mhi_prepare_for_transfer(mhi_dev);
+	if (rc)
+		return rc;
+
 	qdev = devm_kzalloc(&mhi_dev->dev, sizeof(*qdev), GFP_KERNEL);
 	if (!qdev)
 		return -ENOMEM;
-- 
2.17.1

[PATCH 5/5] bus: mhi: core: Move MHI_MAX_MTU to external header file

[Manivannan Sadhasivam]

From: Hemant Kumar <hemantk@codeaurora.org>

Currently this macro is defined in internal MHI header as
a TRE length mask. Moving it to external header allows MHI
client drivers to set this upper bound for the transmit
buffer size.

Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/bus/mhi/core/internal.h | 1 -
 include/linux/mhi.h             | 3 +++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h
index 33c23203c531..3e41edae829c 100644
--- a/drivers/bus/mhi/core/internal.h
+++ b/drivers/bus/mhi/core/internal.h
@@ -453,7 +453,6 @@ enum mhi_pm_state {
 #define CMD_EL_PER_RING			128
 #define PRIMARY_CMD_RING		0
 #define MHI_DEV_WAKE_DB			127
-#define MHI_MAX_MTU			0xffff
 #define MHI_RANDOM_U32_NONZERO(bmsk)	(prandom_u32_max(bmsk) + 1)
 
 enum mhi_er_type {
diff --git a/include/linux/mhi.h b/include/linux/mhi.h
index 6522a4adc794..10ebda44ea3c 100644
--- a/include/linux/mhi.h
+++ b/include/linux/mhi.h
@@ -15,6 +15,9 @@
 #include <linux/wait.h>
 #include <linux/workqueue.h>
 
+/* MHI client drivers to set this upper bound for tx buffer */
+#define MHI_MAX_MTU 0xffff
+
 #define MHI_MAX_OEM_PK_HASH_SEGMENTS 16
 
 struct mhi_chan;
-- 
2.17.1

Re: [PATCH 5/5] bus: mhi: core: Move MHI_MAX_MTU to external header file

[Greg KH]

On Sun, Sep 27, 2020 at 09:06:52AM +0530, Manivannan Sadhasivam wrote:
> From: Hemant Kumar <hemantk@codeaurora.org>
> 
> Currently this macro is defined in internal MHI header as
> a TRE length mask. Moving it to external header allows MHI
> client drivers to set this upper bound for the transmit
> buffer size.
> 
> Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
>  drivers/bus/mhi/core/internal.h | 1 -
>  include/linux/mhi.h             | 3 +++
>  2 files changed, 3 insertions(+), 1 deletion(-)

If no one is using this change, then please don't make it until someone
needs it.

So submit it when you have a user please.

thanks,

greg k-h

Re: [PATCH 5/5] bus: mhi: core: Move MHI_MAX_MTU to external header file

[Manivannan Sadhasivam]

On Sun, Sep 27, 2020 at 12:17:34PM +0200, Greg KH wrote:
> On Sun, Sep 27, 2020 at 09:06:52AM +0530, Manivannan Sadhasivam wrote:
> > From: Hemant Kumar <hemantk@codeaurora.org>
> > 
> > Currently this macro is defined in internal MHI header as
> > a TRE length mask. Moving it to external header allows MHI
> > client drivers to set this upper bound for the transmit
> > buffer size.
> > 
> > Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
> > Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> > ---
> >  drivers/bus/mhi/core/internal.h | 1 -
> >  include/linux/mhi.h             | 3 +++
> >  2 files changed, 3 insertions(+), 1 deletion(-)
> 
> If no one is using this change, then please don't make it until someone
> needs it.
> 
> So submit it when you have a user please.
> 

Okay, will drop it.

Thanks,
Mani

> thanks,
> 
> greg k-h