spice-qemu-char: write to chardev whatever amount it can read
The current code waits until the chardev can read MIN(len, VMC_MAX) But some chardev may never reach than amount, in fact some of them will only ever accept write of 1. Fix the min computation and remove the VMC_MAX constant. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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@ -14,8 +14,6 @@
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} \
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} \
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} while (0)
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} while (0)
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#define VMC_MAX_HOST_WRITE 2048
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typedef struct SpiceCharDriver {
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typedef struct SpiceCharDriver {
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CharDriverState* chr;
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CharDriverState* chr;
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SpiceCharDeviceInstance sin;
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SpiceCharDeviceInstance sin;
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@ -35,8 +33,8 @@ static int vmc_write(SpiceCharDeviceInstance *sin, const uint8_t *buf, int len)
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uint8_t* p = (uint8_t*)buf;
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uint8_t* p = (uint8_t*)buf;
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while (len > 0) {
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while (len > 0) {
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last_out = MIN(len, VMC_MAX_HOST_WRITE);
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last_out = MIN(len, qemu_chr_be_can_write(scd->chr));
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if (qemu_chr_be_can_write(scd->chr) < last_out) {
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if (last_out <= 0) {
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break;
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break;
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}
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}
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qemu_chr_be_write(scd->chr, p, last_out);
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qemu_chr_be_write(scd->chr, p, last_out);
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