sunvdc: Do not spin in an infinite loop when vio_ldc_send() returns EAGAIN (a11f6ca9) · Commits · 戴 / test

__vdc_tx_trigger should only loop on EAGAIN a finite number of times. See commit ("sunvnet: Do not spin in an infinite loop when vio_ldc_send() returns EAGAIN") for detail. Signed-off-by:

Young Xiao <YangX92@hotmail.com> Signed-off-by:

Jens Axboe <axboe@kernel.dk>

drivers/block/sunvdc.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -45,6 +45,8 @@ MODULE_VERSION(DRV_MODULE_VERSION);
		#define WAITING_FOR_GEN_CMD 0x04
		#define WAITING_FOR_ANY -1

		#define VDC_MAX_RETRIES 10

		static struct workqueue_struct *sunvdc_wq;

		struct vdc_req_entry {
		@@ -431,6 +433,7 @@ static int __vdc_tx_trigger(struct vdc_port *port)
		.end_idx = dr->prod,
		};
		int err, delay;
		int retries = 0;

		hdr.seq = dr->snd_nxt;
		delay = 1;
		@@ -443,6 +446,8 @@ static int __vdc_tx_trigger(struct vdc_port *port)
		udelay(delay);
		if ((delay <<= 1) > 128)
		delay = 128;
		if (retries++ > VDC_MAX_RETRIES)
		break;
		} while (err == -EAGAIN);

		if (err == -ENOTCONN)

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