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Subject[PATCH 5.10 17/21] comedi: vmk80xx: fix bulk and interrupt message timeouts
Date
From: Johan Hovold <johan@kernel.org>

commit a56d3e40bda460edf3f8d6aac00ec0b322b4ab83 upstream.

USB bulk and interrupt message timeouts are specified in milliseconds
and should specifically not vary with CONFIG_HZ.

Note that the bulk-out transfer timeout was set to the endpoint
bInterval value, which should be ignored for bulk endpoints and is
typically set to zero. This meant that a failing bulk-out transfer
would never time out.

Assume that the 10 second timeout used for all other transfers is more
than enough also for the bulk-out endpoint.

Fixes: 985cafccbf9b ("Staging: Comedi: vmk80xx: Add k8061 support")
Fixes: 951348b37738 ("staging: comedi: vmk80xx: wait for URBs to complete")
Cc: stable@vger.kernel.org # 2.6.31
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://lore.kernel.org/r/20211025114532.4599-6-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/comedi/drivers/vmk80xx.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)

--- a/drivers/staging/comedi/drivers/vmk80xx.c
+++ b/drivers/staging/comedi/drivers/vmk80xx.c
@@ -91,6 +91,7 @@ enum {
#define IC6_VERSION BIT(1)

#define MIN_BUF_SIZE 64
+#define PACKET_TIMEOUT 10000 /* ms */

enum vmk80xx_model {
VMK8055_MODEL,
@@ -169,10 +170,11 @@ static void vmk80xx_do_bulk_msg(struct c
tx_size = usb_endpoint_maxp(devpriv->ep_tx);
rx_size = usb_endpoint_maxp(devpriv->ep_rx);

- usb_bulk_msg(usb, tx_pipe, devpriv->usb_tx_buf,
- tx_size, NULL, devpriv->ep_tx->bInterval);
+ usb_bulk_msg(usb, tx_pipe, devpriv->usb_tx_buf, tx_size, NULL,
+ PACKET_TIMEOUT);

- usb_bulk_msg(usb, rx_pipe, devpriv->usb_rx_buf, rx_size, NULL, HZ * 10);
+ usb_bulk_msg(usb, rx_pipe, devpriv->usb_rx_buf, rx_size, NULL,
+ PACKET_TIMEOUT);
}

static int vmk80xx_read_packet(struct comedi_device *dev)
@@ -191,7 +193,7 @@ static int vmk80xx_read_packet(struct co
pipe = usb_rcvintpipe(usb, ep->bEndpointAddress);
return usb_interrupt_msg(usb, pipe, devpriv->usb_rx_buf,
usb_endpoint_maxp(ep), NULL,
- HZ * 10);
+ PACKET_TIMEOUT);
}

static int vmk80xx_write_packet(struct comedi_device *dev, int cmd)
@@ -212,7 +214,7 @@ static int vmk80xx_write_packet(struct c
pipe = usb_sndintpipe(usb, ep->bEndpointAddress);
return usb_interrupt_msg(usb, pipe, devpriv->usb_tx_buf,
usb_endpoint_maxp(ep), NULL,
- HZ * 10);
+ PACKET_TIMEOUT);
}

static int vmk80xx_reset_device(struct comedi_device *dev)

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