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Fix a FAT cluster allocation bug. From Tridge

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This commit is contained in:
Gregory Nutt 2014-01-14 13:45:26 -06:00
parent 803cdfdaf1
commit 85e7e13bb0
2 changed files with 6 additions and 3 deletions
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5
ChangeLog
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@ -6433,4 +6433,7 @@
* configs/px4fmu-v2_upstream: Configuration for testing simple
configurations on the the PX4FMU v2. This version is incomplete
for the PX4 appliation and is not a replacement for the version
in the PX4 GIT repository.
in the PX4 GIT repository.
* fs/fat/fs_fat32.c: A correction to FAT cluster allocation from
Tridge via Lorenz Meier (2014-1-14).

4
fs/fat/fs_fat32.c
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@ -623,7 +623,7 @@ fat_read_restart:
* cluster boundary
*/
if (ff->ff_sectorsincluster < 1)
if (buflen > 0 && ff->ff_sectorsincluster < 1)
{
/* Find the next cluster in the FAT. */
@ -899,7 +899,7 @@ fat_write_restart:
* cluster boundary
*/
if (ff->ff_sectorsincluster < 1)
if (buflen > 0 && ff->ff_sectorsincluster < 1)
{
/* Extend the current cluster by one (unless lseek was used to
* move the file position back from the end of the file)