diff options
| author | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2012-02-09 10:13:29 -0800 |
|---|---|---|
| committer | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2012-02-14 11:00:09 +0200 |
| commit | eded3cd0a52252f677ceacd1fbcae13be3d55e8f (patch) | |
| tree | 3b42b49e75a63871440b1e1969ce5ce2bc24134f /lib/libmtd_legacy.c | |
| parent | cc2e57ba328951dca3c34bea2c5d2d3409b16b29 (diff) | |
limbtd: implement mtd_dev_present for old kernels
Implement the 'legacy_dev_present()' function which will check whether an MTD
device is present by scanning the /proc/mtd file when the MTD subsystem does
not support sysfs (the case for pre-2.6.30 kernels).
This patch also moves the 'mtd_dev_present()' function to a slightly more
logical position.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Diffstat (limited to 'lib/libmtd_legacy.c')
| -rw-r--r-- | lib/libmtd_legacy.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/lib/libmtd_legacy.c b/lib/libmtd_legacy.c index d6c3938..d3f1672 100644 --- a/lib/libmtd_legacy.c +++ b/lib/libmtd_legacy.c @@ -170,6 +170,31 @@ int legacy_libmtd_open(void) } /** + * legacy_dev_presentl - legacy version of 'mtd_dev_present()'. + * @info: the MTD device information is returned here + * + * When the kernel does not provide sysfs files for the MTD subsystem, + * fall-back to parsing the /proc/mtd file to determine whether an mtd device + * number @mtd_num is present. + */ +int legacy_dev_present(int mtd_num) +{ + int ret; + struct proc_parse_info pi; + + ret = proc_parse_start(&pi); + if (ret) + return -1; + + while (proc_parse_next(&pi)) { + if (pi.mtd_num == mtd_num) + return 1; + } + + return 0; +} + +/** * legacy_mtd_get_info - legacy version of 'mtd_get_info()'. * @info: the MTD device information is returned here * |