If the device refuses our updated value, then we must be prepared
to receive URBs as big as the device wants to send. Set rx_max
to the device provided value on error.
Signed-off-by: Bjørn Mork <bjorn@xxxxxxx>
---
drivers/net/usb/cdc_ncm.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c
index 4cd582a..6a65662 100644
--- a/drivers/net/usb/cdc_ncm.c
+++ b/drivers/net/usb/cdc_ncm.c
@@ -251,8 +251,11 @@ static u8 cdc_ncm_setup(struct cdc_ncm_ctx *ctx)
kfree(dwNtbInMaxSize);
}
size_err:
- if (err < 0)
- pr_debug("Setting NTB Input Size failed\n");
+ if (err < 0) {
+ /* failed, so attempt to use the device suggested size */
+ ctx->rx_max = le32_to_cpu(ctx->ncm_parm.dwNtbInMaxSize);
+ pr_debug("Setting NTB Input Size failed, reverting to %u\n", ctx->rx_max);
+ }
}
/* verify maximum size of transmitted NTB in bytes */
--
1.7.10.4
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