diff options
| author | Larry Finger <Larry.Finger@lwfinger.net> | 2014-01-13 01:11:38 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-06 23:08:14 +0400 |
| commit | 1a712907b90a5aad689e8757616537a506ba07f9 (patch) | |
| tree | f547cd3d6233da33bf8a98f8362f0ed9ee4dd149 | |
| parent | eeb405fd975fd5b684248d2d9039d685d34fac52 (diff) | |
| download | linux-1a712907b90a5aad689e8757616537a506ba07f9.tar.xz | |
b43: Fix unload oops if firmware is not available
commit 0673effd41dba323d6a280ef37b5ef29f3f5a653 upstream.
The asyncronous firmware load uses a completion struct to hold firmware
processing until the user-space routines are up and running. There is.
however, a problem in that the waiter is nevered canceled during teardown.
As a result, unloading the driver when firmware is not available causes an oops.
To be able to access the completion structure at teardown, it had to be moved
into the b43_wldev structure.
This patch also fixes a typo in a comment.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/wireless/b43/b43.h | 4 | ||||
| -rw-r--r-- | drivers/net/wireless/b43/main.c | 10 |
2 files changed, 7 insertions, 7 deletions
diff --git a/drivers/net/wireless/b43/b43.h b/drivers/net/wireless/b43/b43.h index 7f3d461f7e8d..54376fddfaf9 100644 --- a/drivers/net/wireless/b43/b43.h +++ b/drivers/net/wireless/b43/b43.h @@ -731,8 +731,6 @@ enum b43_firmware_file_type { struct b43_request_fw_context { /* The device we are requesting the fw for. */ struct b43_wldev *dev; - /* a completion event structure needed if this call is asynchronous */ - struct completion fw_load_complete; /* a pointer to the firmware object */ const struct firmware *blob; /* The type of firmware to request. */ @@ -809,6 +807,8 @@ enum { struct b43_wldev { struct b43_bus_dev *dev; struct b43_wl *wl; + /* a completion event structure needed if this call is asynchronous */ + struct completion fw_load_complete; /* The device initialization status. * Use b43_status() to query. */ diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c index 291a1199df96..0b7edd36cfa2 100644 --- a/drivers/net/wireless/b43/main.c +++ b/drivers/net/wireless/b43/main.c @@ -2068,6 +2068,7 @@ void b43_do_release_fw(struct b43_firmware_file *fw) static void b43_release_firmware(struct b43_wldev *dev) { + complete(&dev->fw_load_complete); b43_do_release_fw(&dev->fw.ucode); b43_do_release_fw(&dev->fw.pcm); b43_do_release_fw(&dev->fw.initvals); @@ -2093,7 +2094,7 @@ static void b43_fw_cb(const struct firmware *firmware, void *context) struct b43_request_fw_context *ctx = context; ctx->blob = firmware; - complete(&ctx->fw_load_complete); + complete(&ctx->dev->fw_load_complete); } int b43_do_request_fw(struct b43_request_fw_context *ctx, @@ -2140,7 +2141,7 @@ int b43_do_request_fw(struct b43_request_fw_context *ctx, } if (async) { /* do this part asynchronously */ - init_completion(&ctx->fw_load_complete); + init_completion(&ctx->dev->fw_load_complete); err = request_firmware_nowait(THIS_MODULE, 1, ctx->fwname, ctx->dev->dev->dev, GFP_KERNEL, ctx, b43_fw_cb); @@ -2148,12 +2149,11 @@ int b43_do_request_fw(struct b43_request_fw_context *ctx, pr_err("Unable to load firmware\n"); return err; } - /* stall here until fw ready */ - wait_for_completion(&ctx->fw_load_complete); + wait_for_completion(&ctx->dev->fw_load_complete); if (ctx->blob) goto fw_ready; /* On some ARM systems, the async request will fail, but the next sync - * request works. For this reason, we dall through here + * request works. For this reason, we fall through here */ } err = request_firmware(&ctx->blob, ctx->fwname, |