diff options
| author | Ziyue Yang <yzylivezh@hotmail.com> | 2016-12-15 22:04:53 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-12-22 16:00:26 +0100 |
| commit | 8929fc3a55f33a103adddf9cfd010bcf2b255c7d (patch) | |
| tree | cff6d1ce13e4cb58f5bf0b71ac81e8d5ee38d99e /hw/block/pflash_cfi01.c | |
| parent | 96a3d3927730c9445983f50ac0f55e0fce3851fa (diff) | |
hw/block/pflash_cfi*.c: fix confusing assert fail message
The patch is to fix the confusing assert fail message caused by
un-initialized device structure (from bite sized tasks).
The bug can be reproduced by
./qemu-system-x86_64 -nographic -device cfi.pflash01
The CFI hardware is dynamically loaded by QOM realizing mechanism,
however the realizing function in pflash_cfi01_realize function
requires the device being initialized manually before calling, like
./qemu-system-x86_64 -nographic
-device cfi.pflash01,num-blocks=1024,sector-length=4096,name=testcard
Once the initializing parameters are left off in the command, it will
leave the device structure not initialized, which makes
pflash_cfi01_realize try to realize a zero-volume card, causing
/mnt/EXT_volume/projects/qemu/qemu-dev/exec.c:1378:
find_ram_offset: Assertion `size != 0\' failed.
Through my test, at least the flash device's block-number, sector-length
and its name is needed for pflash_cfi01_realize to behave correctly. So
I think the new asserts are needed to hint the QEMU user to specify
the device's parameters correctly.
Signed-off-by: Ziyue Yang <skiver.cloud.yzy@gmail.com>
Message-Id: <1481810693-13733-1-git-send-email-skiver.cloud.yzy@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Ziyue Yang <yzylivezh@hotmail.com>
Diffstat (limited to 'hw/block/pflash_cfi01.c')
| -rw-r--r-- | hw/block/pflash_cfi01.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c index 62d7a5661d..5f0ee9db00 100644 --- a/hw/block/pflash_cfi01.c +++ b/hw/block/pflash_cfi01.c @@ -707,6 +707,19 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp) int num_devices; Error *local_err = NULL; + if (pfl->sector_len == 0) { + error_setg(errp, "attribute \"sector-length\" not specified or zero."); + return; + } + if (pfl->nb_blocs == 0) { + error_setg(errp, "attribute \"num-blocks\" not specified or zero."); + return; + } + if (pfl->name == NULL) { + error_setg(errp, "attribute \"name\" not specified."); + return; + } + total_len = pfl->sector_len * pfl->nb_blocs; /* These are only used to expose the parameters of each device |