From: Moritz Fischer <moritzf@google.com>
To: netdev@vger.kernel.org
Cc: pabeni@redhat.com, kuba@kernel.org, edumazet@google.com,
davem@davemloft.net, bryan.whitehead@microchip.com,
UNGLinuxDriver@microchip.com, mdf@kernel.org,
Moritz Fischer <moritzf@google.com>,
Marshall Rawson <rawsonm@google.com>
Subject: [PATCH] net: lan743x: Don't sleep in atomic context
Date: Fri, 23 Jun 2023 23:29:49 +0000 [thread overview]
Message-ID: <20230623232949.743733-1-moritzf@google.com> (raw)
dev_set_rx_mode() grabs a spin_lock, and the lan743x implementation
proceeds subsequently to go to sleep using readx_poll_timeout().
Introduce a helper wrapping the readx_poll_timeout_atomic() function
and use it to replace the calls to readx_polL_timeout().
Tested-by: Marshall Rawson <rawsonm@google.com>
Signed-off-by: Moritz Fischer <moritzf@google.com>
---
drivers/net/ethernet/microchip/lan743x_main.c | 20 +++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c
index f1bded993edc..10512f725b57 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -144,6 +144,18 @@ static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
!(data & HW_CFG_LRST_), 100000, 10000000);
}
+static int lan743x_csr_wait_for_bit_atomic(struct lan743x_adapter *adapter,
+ int offset, u32 bit_mask,
+ int target_value, int udelay_min,
+ int udelay_max, int count)
+{
+ u32 data;
+
+ return readx_poll_timeout_atomic(LAN743X_CSR_READ_OP, offset, data,
+ target_value == ((data & bit_mask) ? 1 : 0),
+ udelay_max, udelay_min * count);
+}
+
static int lan743x_csr_wait_for_bit(struct lan743x_adapter *adapter,
int offset, u32 bit_mask,
int target_value, int usleep_min,
@@ -736,8 +748,8 @@ static int lan743x_dp_write(struct lan743x_adapter *adapter,
u32 dp_sel;
int i;
- if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
- 1, 40, 100, 100))
+ if (lan743x_csr_wait_for_bit_atomic(adapter, DP_SEL, DP_SEL_DPRDY_,
+ 1, 40, 100, 100))
return -EIO;
dp_sel = lan743x_csr_read(adapter, DP_SEL);
dp_sel &= ~DP_SEL_MASK_;
@@ -748,8 +760,8 @@ static int lan743x_dp_write(struct lan743x_adapter *adapter,
lan743x_csr_write(adapter, DP_ADDR, addr + i);
lan743x_csr_write(adapter, DP_DATA_0, buf[i]);
lan743x_csr_write(adapter, DP_CMD, DP_CMD_WRITE_);
- if (lan743x_csr_wait_for_bit(adapter, DP_SEL, DP_SEL_DPRDY_,
- 1, 40, 100, 100))
+ if (lan743x_csr_wait_for_bit_atomic(adapter, DP_SEL, DP_SEL_DPRDY_,
+ 1, 40, 100, 100))
return -EIO;
}
--
2.41.0.178.g377b9f9a00-goog
reply other threads:[~2023-06-23 23:30 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=20230623232949.743733-1-moritzf@google.com \
--to=moritzf@google.com \
--cc=UNGLinuxDriver@microchip.com \
--cc=bryan.whitehead@microchip.com \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=kuba@kernel.org \
--cc=mdf@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=rawsonm@google.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).