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-rw-r--r--src/class/msc/msc_host.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/class/msc/msc_host.c b/src/class/msc/msc_host.c
index 83cbe7c89..2c027deff 100644
--- a/src/class/msc/msc_host.c
+++ b/src/class/msc/msc_host.c
@@ -366,7 +366,7 @@ uint16_t msch_open(uint8_t rhport, uint8_t dev_addr, tusb_desc_interface_t const
MSC_PROTOCOL_BOT == desc_itf->bInterfaceProtocol);
// msc driver length is fixed
- uint16_t const drv_len = sizeof(tusb_desc_interface_t) + 2*sizeof(tusb_desc_endpoint_t);
+ uint16_t const drv_len = sizeof(tusb_desc_interface_t) + desc_itf->bNumEndpoints*sizeof(tusb_desc_endpoint_t);
TU_ASSERT(drv_len <= max_len, 0);
msch_interface_t* p_msc = get_itf(dev_addr);