diff options
Diffstat (limited to 'drivers/usb')
-rw-r--r-- | drivers/usb/gadget/f_mass_storage.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c index 32cce02..44e5ffe 100644 --- a/drivers/usb/gadget/f_mass_storage.c +++ b/drivers/usb/gadget/f_mass_storage.c @@ -73,6 +73,8 @@ * being removable. * ->cdrom Flag specifying that LUN shall be reported as * being a CD-ROM. + * ->nofua Flag specifying that FUA flag in SCSI WRITE(10,12) + * commands for this LUN shall be ignored. * * lun_name_format A printf-like format for names of the LUN * devices. This determines how the @@ -127,6 +129,8 @@ * Default true, boolean for removable media. * cdrom=b[,b...] Default false, boolean for whether to emulate * a CD-ROM drive. + * nofua=b[,b...] Default false, booleans for ignore FUA flag + * in SCSI WRITE(10,12) commands * luns=N Default N = number of filenames, number of * LUNs to support. * stall Default determined according to the type of @@ -409,6 +413,7 @@ struct fsg_config { char ro; char removable; char cdrom; + char nofua; } luns[FSG_MAX_LUNS]; const char *lun_name_format; @@ -887,7 +892,7 @@ static int do_write(struct fsg_common *common) curlun->sense_data = SS_INVALID_FIELD_IN_CDB; return -EINVAL; } - if (common->cmnd[1] & 0x08) { /* FUA */ + if (!curlun->nofua && (common->cmnd[1] & 0x08)) { /* FUA */ spin_lock(&curlun->filp->f_lock); curlun->filp->f_flags |= O_SYNC; spin_unlock(&curlun->filp->f_lock); @@ -2662,6 +2667,7 @@ static int fsg_main_thread(void *common_) /* Write permission is checked per LUN in store_*() functions. */ static DEVICE_ATTR(ro, 0644, fsg_show_ro, fsg_store_ro); +static DEVICE_ATTR(nofua, 0644, fsg_show_nofua, fsg_store_nofua); static DEVICE_ATTR(file, 0644, fsg_show_file, fsg_store_file); @@ -2768,6 +2774,9 @@ static struct fsg_common *fsg_common_init(struct fsg_common *common, rc = device_create_file(&curlun->dev, &dev_attr_file); if (rc) goto error_luns; + rc = device_create_file(&curlun->dev, &dev_attr_nofua); + if (rc) + goto error_luns; if (lcfg->filename) { rc = fsg_lun_open(curlun, lcfg->filename); @@ -2911,6 +2920,7 @@ static void fsg_common_release(struct kref *ref) /* In error recovery common->nluns may be zero. */ for (; i; --i, ++lun) { + device_remove_file(&lun->dev, &dev_attr_nofua); device_remove_file(&lun->dev, &dev_attr_ro); device_remove_file(&lun->dev, &dev_attr_file); fsg_lun_close(lun); @@ -3069,8 +3079,10 @@ struct fsg_module_parameters { int ro[FSG_MAX_LUNS]; int removable[FSG_MAX_LUNS]; int cdrom[FSG_MAX_LUNS]; + int nofua[FSG_MAX_LUNS]; unsigned int file_count, ro_count, removable_count, cdrom_count; + unsigned int nofua_count; unsigned int luns; /* nluns */ int stall; /* can_stall */ }; @@ -3096,6 +3108,8 @@ struct fsg_module_parameters { "true to simulate removable media"); \ _FSG_MODULE_PARAM_ARRAY(prefix, params, cdrom, bool, \ "true to simulate CD-ROM instead of disk"); \ + _FSG_MODULE_PARAM_ARRAY(prefix, params, nofua, bool, \ + "true to ignore SCSI WRITE(10,12) FUA bit"); \ _FSG_MODULE_PARAM(prefix, params, luns, uint, \ "number of LUNs"); \ _FSG_MODULE_PARAM(prefix, params, stall, bool, \ |