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[PATCH] m68k: fix PIO case in esp 

we always set ->SCp.ptr to physical address of buffer; for DMA that's
just what we need, but we end up using it as virtual address in PIO
case of esp_do_data(), with obvious breakage as soon as memory mapping
becomes non-trivial.  The fix is obvious.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Al Viro 2006-01-12 01:06:40 -08:00 committed by Linus Torvalds
parent ed1705afb9
commit 3c9757b7c2
1 changed files with 3 additions and 2 deletions
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5
drivers/scsi/NCR53C9x.c
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@ -1799,6 +1799,7 @@ static int esp_do_data(struct NCR_ESP *esp, struct ESP_regs *eregs)
*/ */
int oldphase, i = 0; /* or where we left off last time ?? esp->current_data ?? */ int oldphase, i = 0; /* or where we left off last time ?? esp->current_data ?? */
int fifocnt = 0; int fifocnt = 0;
unsigned char *p = phys_to_virt((unsigned long)SCptr->SCp.ptr);
oldphase = esp_read(eregs->esp_status) & ESP_STAT_PMASK; oldphase = esp_read(eregs->esp_status) & ESP_STAT_PMASK;
@ -1860,7 +1861,7 @@ static int esp_do_data(struct NCR_ESP *esp, struct ESP_regs *eregs)
/* read fifo */ /* read fifo */
for(j=0;j<fifocnt;j++) for(j=0;j<fifocnt;j++)
SCptr->SCp.ptr[i++] = esp_read(eregs->esp_fdata); p[i++] = esp_read(eregs->esp_fdata);
ESPDATA(("(%d) ", i)); ESPDATA(("(%d) ", i));
@ -1882,7 +1883,7 @@ static int esp_do_data(struct NCR_ESP *esp, struct ESP_regs *eregs)
/* fill fifo */ /* fill fifo */
for(j=0;j<this_count;j++) for(j=0;j<this_count;j++)
esp_write(eregs->esp_fdata, SCptr->SCp.ptr[i++]); esp_write(eregs->esp_fdata, p[i++]);
/* how many left if this goes out ?? */ /* how many left if this goes out ?? */
hmuch -= this_count; hmuch -= this_count;