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USB: host: Use zeroing memory allocator rather than allocator/memset

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Use dma_zalloc_coherent for allocating zeroed
memory and remove unnecessary memset function.

Done using Coccinelle.
Generated-by: scripts/coccinelle/api/alloc/kzalloc-simple.cocci
0-day tested with no failures.

Suggested-by: Luis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Himanshu Jha 2017-12-31 01:33:52 +05:30 committed by Greg Kroah-Hartman
parent d19000b885
commit 2b80a29bf8
2 changed files with 3 additions and 7 deletions
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3
drivers/usb/host/uhci-hcd.c
View File

@ -600,7 +600,7 @@ static int uhci_start(struct usb_hcd *hcd)
uhci->dentry = dentry;
#endif
uhci->frame = dma_alloc_coherent(uhci_dev(uhci),
uhci->frame = dma_zalloc_coherent(uhci_dev(uhci),
UHCI_NUMFRAMES * sizeof(*uhci->frame),
&uhci->frame_dma_handle, GFP_KERNEL);
if (!uhci->frame) {
@ -608,7 +608,6 @@ static int uhci_start(struct usb_hcd *hcd)
"unable to allocate consistent memory for frame list\n");
goto err_alloc_frame;
}
memset(uhci->frame, 0, UHCI_NUMFRAMES * sizeof(*uhci->frame));
uhci->frame_cpu = kcalloc(UHCI_NUMFRAMES, sizeof(*uhci->frame_cpu),
GFP_KERNEL);

7
drivers/usb/host/xhci-mem.c
View File

@ -1782,14 +1782,11 @@ int xhci_alloc_erst(struct xhci_hcd *xhci,
struct xhci_erst_entry *entry;
size = sizeof(struct xhci_erst_entry) * evt_ring->num_segs;
erst->entries = dma_alloc_coherent(xhci_to_hcd(xhci)->self.sysdev,
size,
&erst->erst_dma_addr,
flags);
erst->entries = dma_zalloc_coherent(xhci_to_hcd(xhci)->self.sysdev,
size, &erst->erst_dma_addr, flags);
if (!erst->entries)
return -ENOMEM;
memset(erst->entries, 0, size);
erst->num_entries = evt_ring->num_segs;
seg = evt_ring->first_seg;