Ronnie Sahlberg 0be42c8833 If an application specifies zero-copy read-buffers to read the data into ...

for a read10 call, the application might have specified too few buffers
for the full I/O.
For example if the application tries to read just 512 bytes off a MMC device.

In this case we wopuld run out of buffers and fail with a SEGV.

Instead of failing like this, return NULL from the function to locate a suitable buffer and read the remaining data from the command into the callback buffer instead, just like when no read-buffer at all has been specified.

2011-06-12 10:44:31 +10:00

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