All of lore.kernel.org
 help / color / mirror / Atom feed
From: Arnd Bergmann <arnd@arndb.de>
To: "David S. Miller" <davem@davemloft.net>
Cc: Arnd Bergmann <arnd@arndb.de>,
	Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>,
	Grygorii Strashko <grygorii.strashko@ti.com>,
	Andrew Lunn <andrew@lunn.ch>,
	Ilias Apalodimas <ilias.apalodimas@linaro.org>,
	linux-omap@vger.kernel.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] [net-next] davinci_cpdma: don't cast dma_addr_t to pointer
Date: Wed, 10 Jul 2019 10:00:33 +0200	[thread overview]
Message-ID: <20190710080106.24237-1-arnd@arndb.de> (raw)

dma_addr_t may be 64-bit wide on 32-bit architectures, so it is not
valid to cast between it and a pointer:

drivers/net/ethernet/ti/davinci_cpdma.c: In function 'cpdma_chan_submit_si':
drivers/net/ethernet/ti/davinci_cpdma.c:1047:12: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
drivers/net/ethernet/ti/davinci_cpdma.c: In function 'cpdma_chan_idle_submit_mapped':
drivers/net/ethernet/ti/davinci_cpdma.c:1114:12: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
drivers/net/ethernet/ti/davinci_cpdma.c: In function 'cpdma_chan_submit_mapped':
drivers/net/ethernet/ti/davinci_cpdma.c:1164:12: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]

Solve this by using two separate members in 'struct submit_info'.
Since this avoids the use of the 'flag' member, the structure does
not even grow in typical configurations.

Fixes: 6670acacd59e ("net: ethernet: ti: davinci_cpdma: add dma mapped submit")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/net/ethernet/ti/davinci_cpdma.c | 26 ++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/ti/davinci_cpdma.c b/drivers/net/ethernet/ti/davinci_cpdma.c
index 0ca2a1a254de..a65edd2770e6 100644
--- a/drivers/net/ethernet/ti/davinci_cpdma.c
+++ b/drivers/net/ethernet/ti/davinci_cpdma.c
@@ -138,8 +138,8 @@ struct submit_info {
 	struct cpdma_chan *chan;
 	int directed;
 	void *token;
-	void *data;
-	int flags;
+	void *data_virt;
+	dma_addr_t data_dma;
 	int len;
 };
 
@@ -1043,12 +1043,12 @@ static int cpdma_chan_submit_si(struct submit_info *si)
 	mode = CPDMA_DESC_OWNER | CPDMA_DESC_SOP | CPDMA_DESC_EOP;
 	cpdma_desc_to_port(chan, mode, si->directed);
 
-	if (si->flags & CPDMA_DMA_EXT_MAP) {
-		buffer = (dma_addr_t)si->data;
+	if (si->data_dma) {
+		buffer = si->data_dma;
 		dma_sync_single_for_device(ctlr->dev, buffer, len, chan->dir);
 		swlen |= CPDMA_DMA_EXT_MAP;
 	} else {
-		buffer = dma_map_single(ctlr->dev, si->data, len, chan->dir);
+		buffer = dma_map_single(ctlr->dev, si->data_virt, len, chan->dir);
 		ret = dma_mapping_error(ctlr->dev, buffer);
 		if (ret) {
 			cpdma_desc_free(ctlr->pool, desc, 1);
@@ -1086,10 +1086,10 @@ int cpdma_chan_idle_submit(struct cpdma_chan *chan, void *token, void *data,
 
 	si.chan = chan;
 	si.token = token;
-	si.data = data;
+	si.data_virt = data;
+	si.data_dma = 0;
 	si.len = len;
 	si.directed = directed;
-	si.flags = 0;
 
 	spin_lock_irqsave(&chan->lock, flags);
 	if (chan->state == CPDMA_STATE_TEARDOWN) {
@@ -1111,10 +1111,10 @@ int cpdma_chan_idle_submit_mapped(struct cpdma_chan *chan, void *token,
 
 	si.chan = chan;
 	si.token = token;
-	si.data = (void *)data;
+	si.data_virt = NULL;
+	si.data_dma = data;
 	si.len = len;
 	si.directed = directed;
-	si.flags = CPDMA_DMA_EXT_MAP;
 
 	spin_lock_irqsave(&chan->lock, flags);
 	if (chan->state == CPDMA_STATE_TEARDOWN) {
@@ -1136,10 +1136,10 @@ int cpdma_chan_submit(struct cpdma_chan *chan, void *token, void *data,
 
 	si.chan = chan;
 	si.token = token;
-	si.data = data;
+	si.data_virt = data;
+	si.data_dma = 0;
 	si.len = len;
 	si.directed = directed;
-	si.flags = 0;
 
 	spin_lock_irqsave(&chan->lock, flags);
 	if (chan->state != CPDMA_STATE_ACTIVE) {
@@ -1161,10 +1161,10 @@ int cpdma_chan_submit_mapped(struct cpdma_chan *chan, void *token,
 
 	si.chan = chan;
 	si.token = token;
-	si.data = (void *)data;
+	si.data_virt = NULL;
+	si.data_dma = data;
 	si.len = len;
 	si.directed = directed;
-	si.flags = CPDMA_DMA_EXT_MAP;
 
 	spin_lock_irqsave(&chan->lock, flags);
 	if (chan->state != CPDMA_STATE_ACTIVE) {
-- 
2.20.0


             reply	other threads:[~2019-07-10  8:01 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-10  8:00 Arnd Bergmann [this message]
2019-07-10 14:26 ` [PATCH] [net-next] davinci_cpdma: don't cast dma_addr_t to pointer Ivan Khoronzhuk
2019-07-12 22:19 ` David Miller

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190710080106.24237-1-arnd@arndb.de \
    --to=arnd@arndb.de \
    --cc=andrew@lunn.ch \
    --cc=davem@davemloft.net \
    --cc=grygorii.strashko@ti.com \
    --cc=ilias.apalodimas@linaro.org \
    --cc=ivan.khoronzhuk@linaro.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-omap@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.