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USB: make actual_length in struct urb field u32 

actual_length should also be a u32 and not a signed value.  This patch
changes this field to be 'u32' to prevent any potential negative
conversion and comparison errors.

This triggered a few compiler warning messages when these fields were
being used with the min macro, so they have also been fixed up in this
patch.

Cc: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2009-03-06 21:31:03 -08:00
parent 16e2e5f634
commit 8c209e6782
2 changed files with 2 additions and 2 deletions
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2
drivers/usb/serial/ftdi_sio.c
View File

@ -1947,7 +1947,7 @@ static void ftdi_process_read(struct work_struct *work)
priv->prev_status = new_status;
}
length = min(PKTSZ, urb->actual_length-packet_offset)-2;
length = min_t(u32, PKTSZ, urb->actual_length-packet_offset)-2;
if (length < 0) {
dev_err(&port->dev, "%s - bad packet length: %d\n",
__func__, length+2);

2
include/linux/usb.h
View File

@ -1178,7 +1178,7 @@ struct urb {
void *transfer_buffer; /* (in) associated data buffer */
dma_addr_t transfer_dma; /* (in) dma addr for transfer_buffer */
u32 transfer_buffer_length; /* (in) data buffer length */
int actual_length; /* (return) actual transfer length */
u32 actual_length; /* (return) actual transfer length */
unsigned char *setup_packet; /* (in) setup packet (control only) */
dma_addr_t setup_dma; /* (in) dma addr for setup_packet */
int start_frame; /* (modify) start frame (ISO) */