error in ioctl call formating floppy disk

The ioctl system call first appeared in Version 7 of Unix under that name. Device-independent request codes are sometimes used to give userspace access to kernel functions which are only used by core system software or still under development. For instance, a CD-ROM device driver which can instruct a physical device to eject a disc would provide an ioctl request code to do so. It takes a parameter specifying a request code the effect of a call depends completely on the request code. In computing, ioctl (an abbreviation of input/output control) is a system call for device-specific input/output operations and other operations which cannot be expressed by regular system calls. ( February 2010) ( Learn how and when to remove this template message) Please help to improve this article by introducing more precise citations. } else if (*errors >= drive_params.max_errors.reporting) else if (floppy_errors >= drive_params.max_errors.This article includes a list of general references, but it lacks sufficient corresponding inline citations. Void -1455,7 +1454,7 static int interpret_errors(void) Static struct format_descr -530,7 +530,6 static struct format_descr format_req +/* errors encountered on the current (or last) request */ * Errors during formatting are counted here. Static DECLARE_WAIT_QUEUE_HEAD(command_done) Static DECLARE_WAIT_QUEUE_HEAD(fdc_wait) As such the error count is always for the 'current' drive.ĭrivers/block/floppy.c | 20 +++++++++-ġ file changed, 9 insertions(+), 11 deletions(-) PC-compatible controllers also have this limitation by using shared Real given that the driver uses a single drive at a time, as that One initial concern about a single error counter was that errors on oneįloppy drive could be reported on another one, but this problem is not

Redo_fd_request() for a new request via set_next_request(). Pending request, better make it use a static error counter that's resetįor each new request. Static pointer to the error which cannot be kept in sync with the That one in the request anyway, and since the interrupt handler uses a Request just to increment the error count. Interrupt handler bad_flp_intr() may cause a UAF on the recently freed Floppy: use a statically allocated error counter - Greg Kroah-Hartman archive mirror help / color / mirror / Atom feed From: Greg Kroah-Hartman

Error in ioctl call formating floppy disk