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Staging: hv: Get rid of the forward declaration of copy_from_bounce_buffer() 

Get rid of the forward declaration by moving the code around.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
K. Y. Srinivasan 2011-05-10 07:54:31 -07:00 committed by Greg Kroah-Hartman
parent a9753cbd6c
commit 29fe2c9bec
1 changed files with 65 additions and 64 deletions
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129
drivers/staging/hv/storvsc_drv.c
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@ -219,15 +219,77 @@ cleanup:
return NULL;
}
/* Assume the original sgl has enough room */
static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl,
struct scatterlist *bounce_sgl,
unsigned int orig_sgl_count)
{
int i;
int j = 0;
unsigned long src, dest;
unsigned int srclen, destlen, copylen;
unsigned int total_copied = 0;
unsigned long bounce_addr = 0;
unsigned long dest_addr = 0;
unsigned long flags;
local_irq_save(flags);
for (i = 0; i < orig_sgl_count; i++) {
dest_addr = (unsigned long)kmap_atomic(sg_page((&orig_sgl[i])),
KM_IRQ0) + orig_sgl[i].offset;
dest = dest_addr;
destlen = orig_sgl[i].length;
if (bounce_addr == 0)
bounce_addr =
(unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])),
KM_IRQ0);
while (destlen) {
src = bounce_addr + bounce_sgl[j].offset;
srclen = bounce_sgl[j].length - bounce_sgl[j].offset;
copylen = min(srclen, destlen);
memcpy((void *)dest, (void *)src, copylen);
total_copied += copylen;
bounce_sgl[j].offset += copylen;
destlen -= copylen;
dest += copylen;
if (bounce_sgl[j].offset == bounce_sgl[j].length) {
/* full */
kunmap_atomic((void *)bounce_addr, KM_IRQ0);
j++;
/* if we need to use another bounce buffer */
if (destlen || i != orig_sgl_count - 1)
bounce_addr =
(unsigned long)kmap_atomic(
sg_page((&bounce_sgl[j])), KM_IRQ0);
} else if (destlen == 0 && i == orig_sgl_count - 1) {
/* unmap the last bounce that is < PAGE_SIZE */
kunmap_atomic((void *)bounce_addr, KM_IRQ0);
}
}
kunmap_atomic((void *)(dest_addr - orig_sgl[i].offset),
KM_IRQ0);
}
local_irq_restore(flags);
return total_copied;
}
/* Static decl */
static int storvsc_probe(struct hv_device *dev);
static int storvsc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scmnd);
static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd);
static int storvsc_remove(struct hv_device *dev);
static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl,
struct scatterlist *bounce_sgl,
unsigned int orig_sgl_count);
static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl,
struct scatterlist *bounce_sgl,
unsigned int orig_sgl_count);
@ -613,67 +675,6 @@ static unsigned int copy_to_bounce_buffer(struct scatterlist *orig_sgl,
return total_copied;
}
/* Assume the original sgl has enough room */
static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl,
struct scatterlist *bounce_sgl,
unsigned int orig_sgl_count)
{
int i;
int j = 0;
unsigned long src, dest;
unsigned int srclen, destlen, copylen;
unsigned int total_copied = 0;
unsigned long bounce_addr = 0;
unsigned long dest_addr = 0;
unsigned long flags;
local_irq_save(flags);
for (i = 0; i < orig_sgl_count; i++) {
dest_addr = (unsigned long)kmap_atomic(sg_page((&orig_sgl[i])),
KM_IRQ0) + orig_sgl[i].offset;
dest = dest_addr;
destlen = orig_sgl[i].length;
/* ASSERT(orig_sgl[i].offset + orig_sgl[i].length <= PAGE_SIZE); */
if (bounce_addr == 0)
bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0);
while (destlen) {
src = bounce_addr + bounce_sgl[j].offset;
srclen = bounce_sgl[j].length - bounce_sgl[j].offset;
copylen = min(srclen, destlen);
memcpy((void *)dest, (void *)src, copylen);
total_copied += copylen;
bounce_sgl[j].offset += copylen;
destlen -= copylen;
dest += copylen;
if (bounce_sgl[j].offset == bounce_sgl[j].length) {
/* full */
kunmap_atomic((void *)bounce_addr, KM_IRQ0);
j++;
/* if we need to use another bounce buffer */
if (destlen || i != orig_sgl_count - 1)
bounce_addr = (unsigned long)kmap_atomic(sg_page((&bounce_sgl[j])), KM_IRQ0);
} else if (destlen == 0 && i == orig_sgl_count - 1) {
/* unmap the last bounce that is < PAGE_SIZE */
kunmap_atomic((void *)bounce_addr, KM_IRQ0);
}
}
kunmap_atomic((void *)(dest_addr - orig_sgl[i].offset),
KM_IRQ0);
}
local_irq_restore(flags);
return total_copied;
}
/*
* storvsc_queuecommand - Initiate command processing
*/