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wlcore: block read/writes to FW during ELP

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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>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Barak Bercovitz 2014-02-10 13:47:19 +02:00 committed by John W. Linville
parent 9be86cf067
commit 51ae14d0ea
1 changed files with 6 additions and 2 deletions
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8
drivers/net/wireless/ti/wlcore/io.h
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@ -60,7 +60,9 @@ static inline int __must_check wlcore_raw_write(struct wl1271 *wl, int addr,
{
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_raw_read(struct wl1271 *wl, int addr,
{
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);