diff options
| author | Michal Nazarewicz <mina86@mina86.com> | 2014-02-10 10:42:41 +0100 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2014-02-18 10:53:00 -0600 |
| commit | a7ecf0544f0fc710ba6e2ff751d328a4190c4a1f (patch) | |
| tree | cdfad1ce937dc22085e12fbe3cb2f7e31fbb9022 /drivers/usb/gadget/f_fs.c | |
| parent | e46318a00091e3e009363a516acc44a4a80e2ebb (diff) | |
usb: gadget: functionfs: replace FFS_SETUP_STATUS with an inline function
The FFS_SETUP_STATUS macro could be trivialy replaced with an static
inline function but more importantly its name was tad confusing.
The name suggested it was a simple accessor macro but it actually
did change the state of the ffs_data structure perfomring
a FFS_SETUP_CANCELLED -> FFS_NO_SETUP transition. The name of the
function -- ffs_setup_state_clear_cancelled -- should better
describe what the function actually does.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/gadget/f_fs.c')
| -rw-r--r-- | drivers/usb/gadget/f_fs.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c index eb5cb2b4b90d..5bfacf8b9e6e 100644 --- a/drivers/usb/gadget/f_fs.c +++ b/drivers/usb/gadget/f_fs.c @@ -99,6 +99,14 @@ static struct ffs_function *ffs_func_from_usb(struct usb_function *f) } +static inline enum ffs_setup_state +ffs_setup_state_clear_cancelled(struct ffs_data *ffs) +{ + return (enum ffs_setup_state) + cmpxchg(&ffs->setup_state, FFS_SETUP_CANCELLED, FFS_NO_SETUP); +} + + static void ffs_func_eps_disable(struct ffs_function *func); static int __must_check ffs_func_eps_enable(struct ffs_function *func); @@ -246,7 +254,7 @@ static ssize_t ffs_ep0_write(struct file *file, const char __user *buf, ENTER(); /* Fast check if setup was canceled */ - if (FFS_SETUP_STATE(ffs) == FFS_SETUP_CANCELLED) + if (ffs_setup_state_clear_cancelled(ffs) == FFS_SETUP_CANCELLED) return -EIDRM; /* Acquire mutex */ @@ -312,7 +320,7 @@ static ssize_t ffs_ep0_write(struct file *file, const char __user *buf, * rather then _irqsave */ spin_lock_irq(&ffs->ev.waitq.lock); - switch (FFS_SETUP_STATE(ffs)) { + switch (ffs_setup_state_clear_cancelled(ffs)) { case FFS_SETUP_CANCELLED: ret = -EIDRM; goto done_spin; @@ -357,7 +365,8 @@ static ssize_t ffs_ep0_write(struct file *file, const char __user *buf, * transition can be performed and it's protected by * mutex. */ - if (FFS_SETUP_STATE(ffs) == FFS_SETUP_CANCELLED) { + if (ffs_setup_state_clear_cancelled(ffs) == + FFS_SETUP_CANCELLED) { ret = -EIDRM; done_spin: spin_unlock_irq(&ffs->ev.waitq.lock); @@ -423,7 +432,7 @@ static ssize_t ffs_ep0_read(struct file *file, char __user *buf, ENTER(); /* Fast check if setup was canceled */ - if (FFS_SETUP_STATE(ffs) == FFS_SETUP_CANCELLED) + if (ffs_setup_state_clear_cancelled(ffs) == FFS_SETUP_CANCELLED) return -EIDRM; /* Acquire mutex */ @@ -443,7 +452,7 @@ static ssize_t ffs_ep0_read(struct file *file, char __user *buf, */ spin_lock_irq(&ffs->ev.waitq.lock); - switch (FFS_SETUP_STATE(ffs)) { + switch (ffs_setup_state_clear_cancelled(ffs)) { case FFS_SETUP_CANCELLED: ret = -EIDRM; break; @@ -491,7 +500,8 @@ static ssize_t ffs_ep0_read(struct file *file, char __user *buf, spin_lock_irq(&ffs->ev.waitq.lock); /* See ffs_ep0_write() */ - if (FFS_SETUP_STATE(ffs) == FFS_SETUP_CANCELLED) { + if (ffs_setup_state_clear_cancelled(ffs) == + FFS_SETUP_CANCELLED) { ret = -EIDRM; break; } |