Messages in this thread Patch in this message |  | | | Subject | [PATCH] west bridge, addition of common lock on cyasdevice | | From | David Cross <> | | Date | Tue, 05 Oct 2010 18:48:08 -0700 |
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This patch adds and initializes a common lock to cyasdevice module. This is meant to be used in order to avoid error scenarios where the device module could be called by both the block and gadget modules at the same time.
Signed-off-by: David Cross <david.cross@cypress.com> --- diff -uprN -X linux-next-vanilla/Documentation/dontdiff linux-next-vanilla/drivers/staging/westbridge/astoria/device/cyasdevice.c linux-next-incremen/drivers/staging/westbridge/astoria/device/cyasdevice.c --- linux-next-vanilla/drivers/staging/westbridge/astoria/device/cyasdevice.c 2010-10-04 21:56:31.000000000 -0700 +++ linux-next-incremen/drivers/staging/westbridge/astoria/device/cyasdevice.c 2010-10-05 16:25:18.000000000 -0700 @@ -48,6 +48,8 @@ typedef struct cyasdevice { cy_as_device_handle dev_handle; /* Handle to the HAL */ cy_as_hal_device_tag hal_tag; + spinlock_t common_lock; + unsigned long flags; } cyasdevice; /* global ptr to astoria device */ @@ -126,6 +128,20 @@ static void cy_misc_callback(cy_as_devic } } +void cy_as_acquire_common_lock() +{ + spin_lock_irqsave(&cy_as_device_controller->common_lock, + cy_as_device_controller->flags); +} +EXPORT_SYMBOL(cy_as_acquire_common_lock); + +void cy_as_release_common_lock() +{ + spin_unlock_irqrestore(&cy_as_device_controller->common_lock, + cy_as_device_controller->flags); +} +EXPORT_SYMBOL(cy_as_release_common_lock); + /* reset astoria and reinit all regs */ #define PNAND_REG_CFG_INIT_VAL 0x0000 void hal_reset(cy_as_hal_device_tag tag) @@ -331,6 +347,8 @@ static int cyasdevice_initialize(void) ((ver_data.is_debug_mode) ? "debug" : "release"), ver_data.major, ver_data.minor, ver_data.build, str); + spin_lock_init(&cy_as_dev->common_lock); + /* done now */ cy_as_device_controller = cy_as_dev;
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