From: K. Y. Srinivasan Date: Sat, 27 Aug 2011 18:31:08 +0000 (-0700) Subject: Staging: hv: storvsc: Get rid of final_release_stor_device() by inlining code X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a5b2359b05925ade4b9a645b9e45a6c4b8fb1ff0;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git Staging: hv: storvsc: Get rid of final_release_stor_device() by inlining code Get rid of final_release_stor_device() by inlining code. Signed-off-by: K. Y. Srinivasan Signed-off-by: Haiyang Zhang Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/hv/storvsc.c b/drivers/staging/hv/storvsc.c index 1976a34102b8..3e9829f2c1d5 100644 --- a/drivers/staging/hv/storvsc.c +++ b/drivers/staging/hv/storvsc.c @@ -67,22 +67,6 @@ static inline struct storvsc_device *get_in_stor_device( return stor_device; } -/* Drop ref count to 0. No one can use stor_device object. */ -static inline struct storvsc_device *final_release_stor_device( - struct hv_device *device) -{ - struct storvsc_device *stor_device; - - stor_device = (struct storvsc_device *)device->ext; - - /* Busy wait until the ref drop to 1, then set it to 0 */ - while (atomic_cmpxchg(&stor_device->ref_count, 1, 0) != 1) - udelay(100); - - device->ext = NULL; - return stor_device; -} - static int storvsc_channel_init(struct hv_device *device) { struct storvsc_device *stor_device; @@ -401,7 +385,12 @@ int storvsc_dev_remove(struct hv_device *device) storvsc_wait_to_drain(stor_device); - stor_device = final_release_stor_device(device); + /* + * Since we have already drained, we don't need to busy wait + * as was done in final_release_stor_device() + */ + atomic_set(&stor_device->ref_count, 0); + device->ext = NULL; /* Close the channel */ vmbus_close(device->channel);