According to mass storage specification:
"Logical Unit Numbers on the device shall be numbered contiguously
starting from LUN 0 to a maximum LUN of 15 (Fh)"
So let's at least print a warning message that LUNs ids should be
contiguous.
Signed-off-by: Krzysztof Opasiak <k.opasiak@xxxxxxxxxxx>
Acked-by: Michal Nazarewicz <mina86@xxxxxxxxxx>
---
drivers/usb/gadget/function/f_mass_storage.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c
index 5fcd9a0..69167ad 100644
--- a/drivers/usb/gadget/function/f_mass_storage.c
+++ b/drivers/usb/gadget/function/f_mass_storage.c
@@ -3042,6 +3042,13 @@ static int fsg_bind(struct usb_configuration *c, struct usb_function *f)
return -EINVAL;
}
+ for (i = 0; i < ARRAY_SIZE(common->luns); ++i)
+ if (!common->luns[i])
+ break;
+
+ if (ret != i - 1)
+ pr_err("LUN ids should be contiguous.\n");
+
opts = fsg_opts_from_func_inst(f->fi);
if (!opts->no_configfs) {
ret = fsg_common_set_cdev(fsg->common, c->cdev,
--
1.7.9.5
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