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xhci: Fix -Wtautological-pointer-compare

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Modify if condition, since:
 1) Comparison of array 'current->buffer_log' equal to a null pointer
    is always false. Pointed out by clang.
 2) XHCI::CreateDescriptor() sets buffer_log[0] to NULL,
    when bufferSize <= 0.

Change-Id: I9a632dcf9c41435653b0556ed981d78bab846038
Reviewed-on: https://review.haiku-os.org/638
Reviewed-by: waddlesplash <[email protected]>
This commit is contained in:
Murai Takashi
2018-10-22 15:25:35 +00:00
committed by waddlesplash
parent aeeec99e35
commit f203f99dd5
1 changed files with 2 additions and 2 deletions
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src/add-ons/kernel/busses/usb/xhci.cpp
+2 -2
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@@ -1005,7 +1005,7 @@ XHCI::WriteDescriptorChain(xhci_td *descriptor, iovec *vector,
size_t bufferOffset = 0;
while (current != NULL) {
if (current->buffer_log == NULL)
if (current->buffer_log[0] == NULL)
break;
while (true) {
@@ -1060,7 +1060,7 @@ XHCI::ReadDescriptorChain(xhci_td *descriptor, iovec *vector,
size_t bufferOffset = 0;
while (current != NULL) {
if (current->buffer_log == NULL)
if (current->buffer_log[0] == NULL)
break;
while (true) {