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iwlwifi: fix 64-bit division

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do_div() expects unsigned operands and otherwise triggers a warning like:

drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c:465:2: error: comparison of distinct pointer types ('typeof ((rtt_avg)) *' (aka 'long long *') and 'uint64_t *' (aka 'unsigned long long *')) [-Werror,-Wcompare-distinct-pointer-types]
        do_div(rtt_avg, 6666);
        ^~~~~~~~~~~~~~~~~~~~~
include/asm-generic/div64.h:222:28: note: expanded from macro 'do_div'
        (void)(((typeof((n)) *)0) == ((uint64_t *)0));  \
               ~~~~~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~~~
1 error generated.

Change the do_div() to the simpler div_s64() that can handle
negative inputs correctly.

Fixes: 937b10c0de ("iwlwifi: mvm: add debug prints for FTM")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Arnd Bergmann 2019-03-04 21:38:42 +01:00 committed by Kalle Valo
parent 47c2be0c9b
commit 688cd8bd2c
1 changed files with 1 additions and 3 deletions
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4
drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c
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@ -460,9 +460,7 @@ static int iwl_mvm_ftm_range_resp_valid(struct iwl_mvm *mvm, u8 request_id,
static void iwl_mvm_debug_range_resp(struct iwl_mvm *mvm, u8 index,
struct cfg80211_pmsr_result *res)
{
s64 rtt_avg = res->ftm.rtt_avg * 100;
do_div(rtt_avg, 6666);
s64 rtt_avg = div_s64(res->ftm.rtt_avg * 100, 6666);
IWL_DEBUG_INFO(mvm, "entry %d\n", index);
IWL_DEBUG_INFO(mvm, "\tstatus: %d\n", res->status);