From: "Toke Høiland-Jørgensen" <toke@redhat.com>
To: linux-wireless@vger.kernel.org
Cc: "Toke Høiland-Jørgensen" <toke@redhat.com>
Subject: [PATCH] ath9k: Fix error check in ath9k_hw_read_revisions() for PCI devices
Date: Fri, 26 Mar 2021 19:08:19 +0100 [thread overview]
Message-ID: <20210326180819.142480-1-toke@redhat.com> (raw)
When the error check in ath9k_hw_read_revisions() was added, it checked for
-EIO which is what ath9k_regread() in the ath9k_htc driver uses. However,
for plain ath9k, the register read function uses ioread32(), which just
returns -1 on error. So if such a read fails, it still gets passed through
and ends up as a weird mac revision in the log output.
Fix this by changing ath9k_regread() to return -1 on error like ioread32()
does, and fix the error check to look for that instead of -EIO.
Fixes: 2f90c7e5d094 ("ath9k: Check for errors when reading SREV register")
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
---
drivers/net/wireless/ath/ath9k/htc_drv_init.c | 2 +-
drivers/net/wireless/ath/ath9k/hw.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_init.c b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
index db0c6fa9c9dc..ff61ae34ecdf 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_init.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
@@ -246,7 +246,7 @@ static unsigned int ath9k_regread(void *hw_priv, u32 reg_offset)
if (unlikely(r)) {
ath_dbg(common, WMI, "REGISTER READ FAILED: (0x%04x, %d)\n",
reg_offset, r);
- return -EIO;
+ return -1;
}
return be32_to_cpu(val);
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index b66eeb577272..504e316d3394 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -287,7 +287,7 @@ static bool ath9k_hw_read_revisions(struct ath_hw *ah)
srev = REG_READ(ah, AR_SREV);
- if (srev == -EIO) {
+ if (srev == -1) {
ath_err(ath9k_hw_common(ah),
"Failed to read SREV register");
return false;
--
2.31.0
next reply other threads:[~2021-03-26 18:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-26 18:08 Toke Høiland-Jørgensen [this message]
2021-04-19 10:43 ` [PATCH] ath9k: Fix error check in ath9k_hw_read_revisions() for PCI devices Toke Høiland-Jørgensen
2021-04-21 9:09 ` Kalle Valo
2021-04-21 9:36 ` Toke Høiland-Jørgensen
2021-04-21 10:03 ` Lorenzo Bianconi
2021-04-22 13:38 ` Kalle Valo
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