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When the chip is in ELP mode read/write to FW is invalid and may cause
the lower layers to get stuck. The reads/writes concerning ELP wakeup
are the exception here and are checked for. In addition to blocking the
IO, produce a warning.
Signed-off-by: Barak Bercovitz <barak@wizery.com>
Signed-off-by: Eliad Peller <eliad@wizery.com>
---
drivers/net/wireless/ti/wlcore/io.h | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- a/drivers/net/wireless/ti/wlcore/io.h
+++ b/drivers/net/wireless/ti/wlcore/io.h
@@ -60,7 +60,9 @@ static inline int __must_check wlcore_ra
{
int ret;
- if (test_bit(WL1271_FLAG_IO_FAILED, &wl->flags))
+ if (test_bit(WL1271_FLAG_IO_FAILED, &wl->flags) ||
+ WARN_ON((test_bit(WL1271_FLAG_IN_ELP, &wl->flags) &&
+ addr != HW_ACCESS_ELP_CTRL_REG)))
return -EIO;
ret = wl->if_ops->write(wl->dev, addr, buf, len, fixed);
@@ -76,7 +78,9 @@ static inline int __must_check wlcore_ra
{
int ret;
- if (test_bit(WL1271_FLAG_IO_FAILED, &wl->flags))
+ if (test_bit(WL1271_FLAG_IO_FAILED, &wl->flags) ||
+ WARN_ON((test_bit(WL1271_FLAG_IN_ELP, &wl->flags) &&
+ addr != HW_ACCESS_ELP_CTRL_REG)))
return -EIO;
ret = wl->if_ops->read(wl->dev, addr, buf, len, fixed);
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