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Check block driver read error in pflash_cfi0x 

If a flash file of size smaller than the flash size is specified in
the -pflash option, the block driver returns error. But the
pflash_cfi0x ignores the error. This results in a flash content of all
zeroes. And the simulation aborts while executing code.

This patch adds the checks for errors from bdrv_read and escalates it
to the calling code.

Signed-off-by: Vijay Kumar B. <vijaykumar@bravegnu.org>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Vijay Kumar 2009-08-21 10:27:38 +05:30 committed by Anthony Liguori
parent 4c0960c0c4
commit d0e7605ee0
2 changed files with 14 additions and 2 deletions
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8
hw/pflash_cfi01.c
View File

@ -507,6 +507,7 @@ pflash_t *pflash_cfi01_register(target_phys_addr_t base, ram_addr_t off,
{
pflash_t *pfl;
target_phys_addr_t total_len;
int ret;
total_len = sector_len * nb_blocs;
@ -530,7 +531,12 @@ pflash_t *pflash_cfi01_register(target_phys_addr_t base, ram_addr_t off,
pfl->bs = bs;
if (pfl->bs) {
/* read the initial flash content */
bdrv_read(pfl->bs, 0, pfl->storage, total_len >> 9);
ret = bdrv_read(pfl->bs, 0, pfl->storage, total_len >> 9);
if (ret < 0) {
cpu_unregister_io_memory(pfl->fl_mem);
qemu_free(pfl);
return NULL;
}
}
#if 0 /* XXX: there should be a bit to set up read-only,
* the same way the hardware does (with WP pin).

8
hw/pflash_cfi02.c
View File

@ -547,6 +547,7 @@ pflash_t *pflash_cfi02_register(target_phys_addr_t base, ram_addr_t off,
{
pflash_t *pfl;
int32_t chip_len;
int ret;
chip_len = sector_len * nb_blocs;
/* XXX: to be fixed */
@ -568,7 +569,12 @@ pflash_t *pflash_cfi02_register(target_phys_addr_t base, ram_addr_t off,
pfl->bs = bs;
if (pfl->bs) {
/* read the initial flash content */
bdrv_read(pfl->bs, 0, pfl->storage, chip_len >> 9);
ret = bdrv_read(pfl->bs, 0, pfl->storage, chip_len >> 9);
if (ret < 0) {
cpu_unregister_io_memory(pfl->fl_mem);
qemu_free(pfl);
return NULL;
}
}
#if 0 /* XXX: there should be a bit to set up read-only,
* the same way the hardware does (with WP pin).