diff options
| author | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2009-12-09 15:59:03 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-02 14:53:09 -0800 |
| commit | a1d78c16bd31a715785e21967ac6110b386a3c1f (patch) | |
| tree | b0df8ca079b2afad844276fdf2ece21dbcdc38fa /drivers/usb/host/xhci-mem.c | |
| parent | 412566bd716397e28e81fc9b20804bc6a6daf14d (diff) | |
USB: xhci: Allow allocation of commands without input contexts.
The xhci_command structure is the basic structure for issuing commands to
the xHCI hardware. It contains a struct completion (so that the issuing
function can wait on the command), command status, and a input context
that is used to pass information to the hardware. Not all commands need
the input context, so make it optional to allocate. Allow
xhci_free_container_ctx() to be passed a NULL input context, to make
freeing the xhci_command structure simple.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/xhci-mem.c')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 1f1f8a0f2e66..8045bc69083d 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -267,6 +267,8 @@ struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci, void xhci_free_container_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx) { + if (!ctx) + return; dma_pool_free(xhci->device_pool, ctx->bytes, ctx->dma); kfree(ctx); } @@ -844,7 +846,8 @@ static void scratchpad_free(struct xhci_hcd *xhci) } struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci, - bool allocate_completion, gfp_t mem_flags) + bool allocate_in_ctx, bool allocate_completion, + gfp_t mem_flags) { struct xhci_command *command; @@ -852,11 +855,14 @@ struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci, if (!command) return NULL; - command->in_ctx = - xhci_alloc_container_ctx(xhci, XHCI_CTX_TYPE_INPUT, mem_flags); - if (!command->in_ctx) { - kfree(command); - return NULL; + if (allocate_in_ctx) { + command->in_ctx = + xhci_alloc_container_ctx(xhci, XHCI_CTX_TYPE_INPUT, + mem_flags); + if (!command->in_ctx) { + kfree(command); + return NULL; + } } if (allocate_completion) { |