This patch fixes the incomplete data return problem of /proc/ide/pdcnew.
When the number of consecutive read bytes are smaller than the total
data in pdcnew_get_info(), the second read() returns 0.
--- linux-2.5.62-vanilla/drivers/ide/pci/pdc202xx_new.c Sat Feb 22 23:00:52 2003
+++ linux-2.5.62/drivers/ide/pci/pdc202xx_new.c Sat Feb 22 23:33:19 2003
@@ -77,13 +77,17 @@
static int pdcnew_get_info (char *buffer, char **addr, off_t offset, int count)
{
char *p = buffer;
- int i;
+ int i, len;
for (i = 0; i < n_pdc202_devs; i++) {
struct pci_dev *dev = pdc202_devs[i];
p = pdcnew_info(buffer, dev);
}
- return p-buffer; /* => must be less than 4k! */
+ /* p - buffer must be less than 4k! */
+ len = (p - buffer) - offset;
+ *addr = buffer + offset;
+
+ return len > count ? count : len;
}
#endif /* defined(DISPLAY_PDC202XX_TIMINGS) && defined(CONFIG_PROC_FS) */