haraldwolff/qemu-patch-raspberry4
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

ide: Clear DRQ after handling all expected accesses

Browse source 
This is additional hardening against an end_transfer_func that fails to
clear the DRQ status bit. The bit must be unset as soon as the PIO
transfer has completed, so it's better to do this in a central place
instead of duplicating the code in all commands (and forgetting it in
some).

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Kevin Wolf 2015-07-26 23:42:53 -04:00 committed by John Snow
parent 03441c3a4a
commit cb72cba830
1 changed files with 12 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
hw/ide/core.c
View file

@ -2028,8 +2028,10 @@ void ide_data_writew(void *opaque, uint32_t addr, uint32_t val)
*(uint16_t *)p = le16_to_cpu(val);
p += 2;
s->data_ptr = p;
if (p >= s->data_end)
if (p >= s->data_end) {
s->status &= ~DRQ_STAT;
s->end_transfer_func(s);
}
}
uint32_t ide_data_readw(void *opaque, uint32_t addr)
@ -2053,8 +2055,10 @@ uint32_t ide_data_readw(void *opaque, uint32_t addr)
ret = cpu_to_le16(*(uint16_t *)p);
p += 2;
s->data_ptr = p;
if (p >= s->data_end)
if (p >= s->data_end) {
s->status &= ~DRQ_STAT;
s->end_transfer_func(s);
}
return ret;
}
@ -2078,8 +2082,10 @@ void ide_data_writel(void *opaque, uint32_t addr, uint32_t val)
*(uint32_t *)p = le32_to_cpu(val);
p += 4;
s->data_ptr = p;
if (p >= s->data_end)
if (p >= s->data_end) {
s->status &= ~DRQ_STAT;
s->end_transfer_func(s);
}
}
uint32_t ide_data_readl(void *opaque, uint32_t addr)
@ -2103,8 +2109,10 @@ uint32_t ide_data_readl(void *opaque, uint32_t addr)
ret = cpu_to_le32(*(uint32_t *)p);
p += 4;
s->data_ptr = p;
if (p >= s->data_end)
if (p >= s->data_end) {
s->status &= ~DRQ_STAT;
s->end_transfer_func(s);
}
return ret;
}